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E. J. ARMSTRONG. STEAM ENGINE CRANK DISK.

Patented June 2, 1896.

KNDREW BERRNAM. PHOTOMIHQWASHINGTON. D11

lINrTnn STAT S PATENT @FFICE,

EDIVIN J. ARMSTRONG, OF OSIVEGO, NEW YORK, ASSIGNOR TO AMES IRON \VORKS, OF SAME PLACE.

STEAM-ENGINE CRANK-DISK.

SPECIFICATION forming part of Letters Patent No. 561,533, dated June 2, 1896.

Application filed April 6, 1895. Serial No. 544,756. (N0 model.)

To all whom it may concern.-

Be it known that I, EDWIN J. ARMSTRONG, a citizen of the United States, residing at Oswego, in the county of Oswego and State of New Yorlghave invented certain new and useful Improvements in Steam-Engine Crank- Disks and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

In the construction of the modern highspeed steam-engine it is customary to entirely cover up the crank-disks in order to prevent oil being thrown from them upon surrounding objects, such inclosing case detracting from the appearance of the engine and confining the heat generated by the bearings, to the detriment of the latter.

It is the object of this invention to provide a crank-disk, nearly the whole periphery of which may be uncovered, thus adding to the sightly appearance of the engine and permitting dissipation into the atmosphere of heat generated by the bearings, and also to provide means whereby the waste oil is caused to be thrown off from a particular part of the periphery of the disk and into a narrow case, and also to enable the disks to be handled without danger of marring their highly-polished surfaces.

In the accompanying drawings, forming'a part of this specification, Figure 1 is a vertical cross-section through the main bearings of a steam-engine, showing my invention applied thereto; Fig. 2, a perspective view of a complete crank, and Fig. 3 a plan view with the casing partly removed to show the disks.

Similar letters refer to similar parts throughout the several views.

In the following description only such parts of a steam-engine as are involved or directly connected with my invention will be fully de scribed. Such other parts as are shown in the drawings are or may be of the usual or any desired type.

A represents the frame in bearings, on which is mounted the crank-shaft B, to which is secured my improved OPa11k(llSlS O in the usual or any desired manner. On the periphery of the crank-disks I form in casting a rib a, which extends directly around the disk and projects above the same a suitable distance, said rib being preferably on or near the inner edge of the disk at its top and having one or both of its sides slightly tapering from the surface of the disk, as shown, whereby any oil collected on the disk will be caused to move or travel to the rib and to be thrown off inside a narrow case D, arranged above and covering the said ribs.

The case D, a portion of which is shown in Fig. 1, is attached to the frame by bolts and is only of sufficient width to span the distance between the outer sides of the ribs on the two disks. Thus it will be observed that any oil thrown off by the disks will be caught by the case, and, as the latter forms a continuation of the casing Z ,which extends below the disks, cannot reach the walls, ceilings, or floor of the building in which the engine is located.

This invention posesses two exceedingly practical advantages in addition to its main purpose, besides adding to the appearance of the engine-namely, first, the exposure of the disks aids materially in the dissipation into the atmosphere of any heat generated by the bearings, and, second, the projecting ribs are exceedingly useful in handling the crankdisks during manufacture or erection, as they prevent the highly-polished surfaces of the disks becoming marred, as happens where the disk is plain.

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent, is-

1. A orank-disk for steam-engines having a peripheral oil-collecting rib formed thereon, whereby the oil collecting on the disk will be led to and thrown off by said rib, substantially as and for the purpose described.

2. The combination, in a steam-engine, of

a crank-disk having a peripheral oil-collecting rib formed thereon, and a casing arranged above said disk to cover said rib, whereby any oil collecting on the disk will be thrown off by said rib within the casing, substantially as described.

In testimony whereof affix my signature in presence of two witnesses.

EDWIN J. ARMSTRONG. Vitnesses:

SOHUYLER J. HARRIS, THOMAS L. BRADFORD 

